Sounds similar to when i fell fore-head first onto a concrete slab for 2 meters up (Freerunning = Fail) Very similar symptoms to you poizen, dizzyness and headache's. Lasted a week or so and all cleared up after that - suffice to say i never tried to flip off a house again..
So yeh, probably just mashed up your brain a little - the brain's a remarkable thing, It repairs it's self very well the majority of the time, just give it a few weeks or months. Heck people have knifes and hammers and bullets through and onto there brains and after abit of therapy there fine. I wouldn't worry too much - unless you caused massive trauma to the brain, in which case you would usually be in a coma with internal bleeding in the brain and you would certainly know about that if u did.